Waterspout — Gulf Side of the Lower Keys Out 20nm, Gulf of Mexico

2015-09-13 · near Marathon, Gulf Side of the Lower Keys Out 20nm, Gulf of Mexico

Event narrative

A large waterspout with attendant spray ring was observed approximately two miles northwest of the east end of the Seven Mile Bridge.

Wider weather episode

A thermally-enhanced circulation developing over Florida Bay and extreme south Florida produced deep convection originating east of Miami, which propagated southwest along a pre-existing cloud line just north of the Middle and Upper Keys. The resultant updrafts from new convective cells resulted in several waterspouts being observed just north of Islamorada and the Seven Mile Bridge.

View location on OpenStreetMap → (24.7200, -81.1600)

Source: NOAA Storm Events Database, event_id 603148. Narrative written by the NWS forecast office that issued the report.